With the Numark CDN77USB, you can play back MP3 files from a CD or flash drive. This player is suitable for the mobile DJ or service industry-related parties. This player lets you play 2 different CDs simultaneously, so you won't need a second player. You can connect a hard drive or USB flash drive to the player, so you can have access to your entire music library. With a single push of the button, you can enable or disable the loop function. You can speed up or slow down the music with the pitch fader.